Calculate IP ranges and check containment
An IP range calculator is a practical tool that helps you figure out which IP addresses belong to a specific network block. Think of it as a digital map that shows you all the addresses you can use within a given subnet or CIDR block. Whether you're setting up a new network, planning DHCP scopes, or troubleshooting connectivity issues, this calculator saves you from doing tedious manual math.
When you work with networks, you often need to know the exact range of IP addresses available. For example, if someone gives you a CIDR notation like 192.168.1.0/24, you might want to see that this translates to addresses from 192.168.1.1 through 192.168.1.254. An IP range calculator does this conversion instantly, showing you the first usable address, the last usable address, and how many hosts you can actually assign.
This tool is especially handy when you're working with cloud platforms like AWS or Azure, where you need to plan VPC subnets carefully. Instead of guessing whether an IP address falls within a certain range, you can quickly check it. The calculator also helps you convert between different formats—maybe you have a subnet mask and need to see the IP range, or you have an IP range and want to know the CIDR notation that matches it.
Network administrators, system engineers, and even students studying networking find this tool invaluable. It eliminates calculation errors that could lead to misconfigured firewalls, overlapping DHCP scopes, or routing problems. Plus, it works for both IPv4 and IPv6 networks, making it a versatile addition to your networking toolkit.
Start by entering a starting IP address and an ending IP address in the calculator. For instance, if you want to see the range from 192.168.1.0 to 192.168.1.255, just type those addresses into the fields. Click "Calculate Range" and you'll instantly see the total number of addresses, the network address, and the broadcast address. This is perfect when you need to convert CIDR to IP range or when you're working with subnet masks.
Need to verify whether a specific IP address belongs to a certain network? Enter the IP address you want to check, along with the start and end IP addresses of your range. The calculator will tell you immediately if that address falls within the specified range. This CIDR range check feature is great for troubleshooting network issues or validating firewall rules.
The calculator helps you move between different network representations. If you have a subnet mask like 255.255.255.0, you can use it alongside an IP address to determine the exact range. Conversely, if you know your IP range, you can figure out what CIDR notation or subnet mask would represent it. This bidirectional conversion makes it easy to work with whatever format your tools or documentation use.
No more manual counting or binary math. Enter your CIDR notation or subnet mask, and get the complete IP address range in seconds. Perfect for quick network planning or when you need to calculate IP range from CIDR on the fly.
Verify whether any IP address belongs to a specific network block with confidence. This CIDR range check feature prevents configuration mistakes that could break routing or security policies.
Easily convert between CIDR notation, subnet masks, and IP ranges. Whether you need to convert CIDR to IP range or find the CIDR from an IP range, the calculator handles it all.
Plan AWS VPCs, Azure subnets, and other cloud network configurations with precision. Calculate CIDR for IP range blocks to ensure your subnets don't overlap and have enough addresses for your needs.
Design DHCP scopes accurately by knowing exactly which IP addresses are available. Use the usable IP range calculator to determine how many devices you can support in each subnet.
Validate firewall rules and access control lists by checking if IP addresses fall within expected ranges. Prevents security gaps caused by incorrect IP range definitions.
Convert any CIDR notation (like /24 or /16) into its corresponding IP address range. Enter a CIDR block and instantly see the first and last usable addresses, making it easy to find IP range from CIDR.
Calculate IP address range from subnet mask by entering an IP address and its subnet mask. The calculator shows you the complete network range, including network and broadcast addresses.
Quickly check if an IP address belongs to a specific range. This CIDR range check feature is perfect for troubleshooting network connectivity or validating configuration settings.
Have an IP range but need the CIDR notation? Enter your start and end IP addresses, and the calculator helps you determine the appropriate CIDR block that matches your range.
See exactly how many usable IP addresses are in your range. The calculator subtracts the network and broadcast addresses to show you the actual number of hosts you can assign.
Access the IP range calculator online from your desktop, tablet, or smartphone. No installation required—just open your browser and start calculating IP ranges wherever you are.
When setting up cloud networks, you need to ensure your subnets don't overlap. Use the AWS CIDR range calculator or Azure calculator features to plan your IP address space efficiently and avoid conflicts.
Configure DHCP servers by calculating the exact IP range for each scope. The DHCP range calculator helps you determine how many addresses you can assign and ensures you're not wasting IP space.
Create accurate firewall rules by verifying IP ranges before applying them. Check IP subnet ranges to ensure your security policies target the correct network segments.
When devices can't communicate, verify they're on the same network by checking if their IP addresses fall within the expected range. This subnet range checker helps identify misconfigurations quickly.
Students studying for networking certifications can use this tool to understand how IP ranges work. Convert between formats to see the relationships between CIDR notation, subnet masks, and IP ranges.